# SMARTアドレス帳 for Local Sync vs HENNGE Lock

The clearest difference is in-app purchases: HENNGE Lock at none against SMARTアドレス帳 for Local Sync's 1. HENNGE Lock also leads on review sentiment (17% vs 8%). SMARTアドレス帳 for Local Sync's advantage is iOS requirement (14.0 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SMARTアドレス帳 for Local Sync sells 1 one-off in-app purchase. HENNGE Lock asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SMARTアドレス帳 for Local Sync | HENNGE Lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (4 ratings)](https://appshunter.io/ios/app/hennge-lock/id1457679156/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 7.8% of reviews | **16.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 8 MB | 14 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Neos Corporation](https://appshunter.io/developer/455598658) | [HENNGE K.K.](https://appshunter.io/developer/571240331) |

## What reviewers say

### SMARTアドレス帳 for Local Sync

[App page](https://appshunter.io/ios/app/smart-for-local-sync/id667792796)

This contact management app offers familiar features for organizing contacts, including group creation, bulk messaging, and birthday notifications. It allows for easy searching and management of your address book.

**Highlights:** Group creation and editing, Bulk email sending, Birthday notifications, Favorite contact filtering, Contact search by name, email, or number, Call history display

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 機能制限の解除 | $1.99 | one-time |


### HENNGE Lock

[App page](https://appshunter.io/ios/app/hennge-lock/id1457679156)

This app offers One Time Password generation for secure second-factor authentication on compatible websites and services. It also provides enhanced security for specific cloud services, ensuring a smooth and protected login process.

**Highlights:** One Time Password (OTP) generation, Second Factor Authentication (2FA), Secure login for compatible services, Enhanced security for HENNGE One, Seamless authentication experience

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SMARTアドレス帳 for Local Sync free?

SMARTアドレス帳 for Local Sync is free to download, with in-app purchases available.

### Is HENNGE Lock free?

HENNGE Lock is free to download, with no in-app purchases.

### Do SMARTアドレス帳 for Local Sync or HENNGE Lock have ads?

Neither SMARTアドレス帳 for Local Sync nor HENNGE Lock shows ads.

### Which is updated more often, SMARTアドレス帳 for Local Sync or HENNGE Lock?

SMARTアドレス帳 for Local Sync ships an update every 2 months, and HENNGE Lock every 2 months. Most recently, SMARTアドレス帳 for Local Sync was updated on October 22, 2026 and HENNGE Lock on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*